Trying to use a shadowed dependency (moulconfig), but getting constant crashes

net.minecraftforge.fml.common.LoaderException: java.lang.ExceptionInInitializerError
	at net.minecraftforge.fml.common.LoadController.transition(LoadController.java:162)
	at net.minecraftforge.fml.common.Loader.initializeMods(Loader.java:739)
	at net.minecraftforge.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:310)
	at net.minecraft.client.Minecraft.startGame(Minecraft.java:495)
	at net.minecraft.client.Minecraft.run(Minecraft.java:329)
	at net.minecraft.client.main.Main.main(SourceFile:124)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at gg.essential.loader.stage2.relaunch.Relaunch.relaunch(Relaunch.java:124)
	at gg.essential.loader.stage2.EssentialLoader.preloadEssential(EssentialLoader.java:220)
	at gg.essential.loader.stage2.EssentialLoader.loadPlatform(EssentialLoader.java:116)
	at gg.essential.loader.stage2.EssentialLoaderBase.load(EssentialLoaderBase.java:148)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at gg.essential.loader.stage1.EssentialLoaderBase.load(EssentialLoaderBase.java:293)
	at gg.essential.loader.stage1.EssentialSetupTweaker.<init>(EssentialSetupTweaker.java:44)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
	at java.lang.reflect.Constructor.newInstance(Unknown Source)
	at gg.essential.loader.stage0.EssentialSetupTweaker.loadStage1(EssentialSetupTweaker.java:53)
	at gg.essential.loader.stage0.EssentialSetupTweaker.<init>(EssentialSetupTweaker.java:26)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
	at java.lang.reflect.Constructor.newInstance(Unknown Source)
	at java.lang.Class.newInstance(Unknown Source)
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:98)
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:243)
	at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:278)
	at org.multimc.EntryPoint.listen(EntryPoint.java:143)
	at org.multimc.EntryPoint.main(EntryPoint.java:34)
Caused by: java.lang.ExceptionInInitializerError
	at me.ryan.ryanair.deps.moulconfig.processor.BuiltinMoulConfigGuis.addProcessors(BuiltinMoulConfigGuis.java:57)
	at me.ryan.ryanair.config.ConfigManager.init(ConfigManager.java:16)
	at me.ryan.ryanair.RyanairMod.init(RyanairMod.java:40)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at net.minecraftforge.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:560)
	at sun.reflect.GeneratedMethodAccessor8.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
	at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
	at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
	at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
	at com.google.common.eventbus.EventBus.post(EventBus.java:275)
	at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:211)
	at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:189)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
	at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
	at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
	at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
	at com.google.common.eventbus.EventBus.post(EventBus.java:275)
	at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:118)
	at net.minecraftforge.fml.common.Loader.initializeMods(Loader.java:737)
	... 45 more
Caused by: java.util.NoSuchElementException: Collection is empty.
	at kotlin.collections.CollectionsKt___CollectionsKt.first(_Collections.kt:201)
	at me.ryan.ryanair.deps.moulconfig.common.IMinecraft.<clinit>(IMinecraft.kt:60)
	... 74 more

package me.ryan.ryanair.config;

import io.github.notenoughupdates.moulconfig.processor.BuiltinMoulConfigGuis;
import io.github.notenoughupdates.moulconfig.processor.ConfigProcessorDriver;
import io.github.notenoughupdates.moulconfig.processor.MoulConfigProcessor;
import me.ryan.ryanair.player.Player;
import net.minecraft.client.gui.GuiScreen;

public class ConfigManager {
    public static GuiScreen screenToOpen = null;
    private static final RyanairConfig con = new RyanairConfig();

    public static void init(){
//        MoulConfigProcessor<TestConfig> processor = new MoulConfigProcessor<>(testConfig);
        MoulConfigProcessor<RyanairConfig> processor = new MoulConfigProcessor<>(con);             //LINE THAT CRASHES
        BuiltinMoulConfigGuis.addProcessors(processor);
        ConfigProcessorDriver driver = new ConfigProcessorDriver(processor);
        driver.checkExpose = false;
        driver.processConfig(con);
        con.testCategory.text2.whenChanged((oldValue, newValue) ->
                Player.sendChatMessage("Just changed text2 from " + oldValue + " to " + newValue));
    }
}

@EventHandler
    public void init(FMLInitializationEvent event){
        MinecraftForge.EVENT_BUS.register(new ItemTooltipListener(this));
        MinecraftForge.EVENT_BUS.register(new TickListener(this));
        MinecraftForge.EVENT_BUS.register(new KeyInputListener(this));
        ClientCommandHandler.instance.registerCommand(new StonkPriceCommand());
        ClientRegistry.registerKeyBinding(debugKey);
        ConfigManager.init();                                                                //THIS LINE CRASHES
    }

import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar

// For those who want the bleeding edge
buildscript {
    repositories {
        jcenter()
        maven {
            name = "forge"
            url = "http://files.minecraftforge.net/maven"
        }
        maven{
            name = "neu"
            url = "https://maven.notenoughupdates.org/releases"
        }
    }
    dependencies {
        classpath 'net.minecraftforge.gradle:ForgeGradle:2.1-SNAPSHOT'
        classpath 'com.github.jengelman.gradle.plugins:shadow:2.0.4'
    }
}
apply plugin: 'net.minecraftforge.gradle.forge'
apply plugin: 'com.github.johnrengelman.shadow'

/*
// for people who want stable - not yet functional for MC 1.8.8 - we require the forgegradle 2.1 snapshot
plugins {
    id "net.minecraftforge.gradle.forge" version "2.0.2"
}
*/
project.sourceCompatibility = '1.8'
project.targetCompatibility = '1.8'
version = "1.1"
group= "me.ryan.ryanair" // http://maven.apache.org/guides/mini/guide-naming-conventions.html
archivesBaseName = "ryanair"

minecraft {
    version = "1.8.9-11.15.1.2318-1.8.9"
    runDir = "run"
    
    // the mappings can be changed at any time, and must be in the following format.
    // snapshot_YYYYMMDD   snapshot are built nightly.
    // stable_#            stables are built at the discretion of the MCP team.
    // Use non-default mappings at your own risk. they may not allways work.
    // simply re-run your setup task after changing the mappings to update your workspace.
    mappings = "stable_20"
    // makeObfSourceJar = false // an Srg named sources jar is made by default. uncomment this to disable.
//    launchConfigs {
//        client {
//            arg '--tweakClass', 'io.github.notenoughupdates.moulconfig.tweaker.DevelopmentResourceTweaker'
//        }
//    }
}

configurations {
    shadowModImpl
    modImplementation.extendsFrom shadowModImpl
}

dependencies {
    shadowModImpl files('libs/legacy-3.0.0-beta.13.jar')
}


dependencies {
    // you may put jars on which you depend on in ./libs
    // or you may define them like so..
    //compile "some.group:artifact:version:classifier"
    //compile "some.group:artifact:version"
      
    // real examples
//    compile 'io.github.notenoughupdates:moulconfig:'  // adds neu to the dev env
    //compile 'com.googlecode.efficient-java-matrix-library:ejml:0.24' // adds ejml to the dev env

    // the 'provided' configuration is for optional dependencies that exist at compile-time but might not at runtime.
    //provided 'com.mod-buildcraft:buildcraft:6.0.8:dev'

    // the deobf configurations:  'deobfCompile' and 'deobfProvided' are the same as the normal compile and provided,
    // except that these dependencies get remapped to your current MCP mappings
    //deobfCompile 'com.mod-buildcraft:buildcraft:6.0.8:dev'
    //deobfProvided 'com.mod-buildcraft:buildcraft:6.0.8:dev'

    // for more info...
    // http://www.gradle.org/docs/current/userguide/artifact_dependencies_tutorial.html
    // http://www.gradle.org/docs/current/userguide/dependency_management.html

}

tasks.withType(ShadowJar) {
    configurations = [project.configurations.shadowModImpl]
    relocate 'io.github.notenoughupdates.moulconfig', 'me.ryan.ryanair.deps.moulconfig'
    finalizedBy 'reobfShadowJar'
}

processResources
{
    // this will ensure that this task is redone when the versions change.
    inputs.property "version", project.version
    inputs.property "mcversion", project.minecraft.version

    // replace stuff in mcmod.info, nothing else
    from(sourceSets.main.resources.srcDirs) {
        include 'mcmod.info'
                
        // replace version and mcversion
        expand 'version':project.version, 'mcversion':project.minecraft.version
    }
        
    // copy everything else, thats not the mcmod.info
    from(sourceSets.main.resources.srcDirs) {
        exclude 'mcmod.info'
    }
}
assemble.dependsOn shadowJar

reobf {
    shadowJar {}
}

task copyJarToBin(type: Copy) {
    from "${buildDir}/libs/ryanair-${project.version}-all.jar"
    into "C:\\Users\\ryanv\\Desktop\\programmas\\handige mc shit\\MultiMC\\instances\\1.8.9\\.minecraft\\mods"
}